Sewer cleaning machine



FIG. 1 is a front, left side, and top perspective view of a sewer cleaning machine showing the new design;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front elevation view thereof; and,

FIG. 8 is a rear, right side, and top perspective view thereof.

The broken lines shown in the drawings illustrate portions of the sewer cleaning machine that form no part of the claimed design. 

CLAIM The ornamental design for a sewer cleaning machine, as shown and described. 